Fan Speed; Fan Failure; Ntp-G268 Install The Fan-Tray Assembly In The Ons 15454 M2 Shelf - Cisco ONS 15454 Hardware Installation Manual

Installing the ONS 15454 M2 Shelf
Note The fan-tray assembly should be installed only after installing the power module. During the system startup
or fan-tray replacement, the inventory data of the fan-tray assembly and the power module is displayed in the
Inventory tab of CTC after a delay of approximately 6 minutes.
After you install the fan-tray, you should only access it if a fan failure occurs. To clean and replace the fan-tray
assembly, see the "Maintain the Node" chapter in the Cisco ONS 15454 DWDM Configuration Guide.
Note
If the fan-tray assembly is removed from the shelf, wait for at least 5 seconds before plugging it back into the
shelf. In the event the LCD display on the fan-tray assembly appears blank, remove the unit from the shelf,
wait for at least 5 seconds and reinsert the unit into the shelf.
A back-up flash memory is fitted into the fan-tray assembly to support the database (DB) and image back-up
in the single mode operation of the ONS 15454 M2.

Fan Speed

Fan speed is controlled by the TNC, TNCE, TSC, TNCS-2, TNCS-2O, or TSCE card temperature sensors.
The sensors measure the input air temperature at the fan-tray assembly. Fan speed options are low, medium,
and high. If the TNC, TNCE, TSC, TNCS-2, TNCS-2O, or TSCE card fails, the fans automatically shift to
high speed. The temperature measured by the TNC, TNCE, TSC, TNCS-2, TNCS-2O, or TSCE sensors
appears on the LCD screen.

Fan Failure

If one or more fans fail on the fan-tray assembly, replace the entire assembly. You cannot replace individual
fans. The red Fan Fail LED on the front of the fan-tray illuminates when one or more fans fail. The red Fan
Fail LED clears after you install a working fan-tray.

NTP-G268 Install the Fan-Tray Assembly in the ONS 15454 M2 Shelf

Purpose
Tools/Equipment
Prerequisite Procedures
Required/As Needed
Onsite/Remote
Security Level
This procedure installs the 15454-M2-FTA or 15454-M2-FTA2 fan-tray assembly
in the ONS 15454 M2 system.
Small slot-head screwdriver
• NTP-G266 Install the ONS 15454 M2 Shelf, on page
• Connect the chassis to the office ground. For detailed instructions on how
to ground the chassis, see the
for Cisco CPT and Cisco ONS
• NTP-G267 Install the Power Module in the ONS 15454 M2 Shelf, on page
230.
Required
Onsite
None
Cisco ONS 15454 Hardware Installation Guide
194.
Electrostatic Discharge and Grounding Guide
Platforms.
Fan Speed
235